Huvitavat is in the 3rd case. The sentence essentially translates into '' What interesting things are there around your home?'' 1.huvitav 2.huvitava 3.huvitavat 4.huvitavasse 5.huvitavas 6.huvitavast 7.huvitavale 8.huvitaval 9.huvitavalt 10.huvitavaks 11.huvitavani 12.huvitavana 13.huvitavata 14.huvitavaga